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/* $OpenBSD: print-ip.c,v 1.47 2016/10/30 04:10:21 jsg Exp $ */ |
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/* |
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* Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997 |
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* The Regents of the University of California. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that: (1) source code distributions |
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* retain the above copyright notice and this paragraph in its entirety, (2) |
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* distributions including binary code include the above copyright notice and |
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* this paragraph in its entirety in the documentation or other materials |
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* provided with the distribution, and (3) all advertising materials mentioning |
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* features or use of this software display the following acknowledgement: |
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* ``This product includes software developed by the University of California, |
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* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of |
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* the University nor the names of its contributors may be used to endorse |
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* or promote products derived from this software without specific prior |
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* written permission. |
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED |
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* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF |
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. |
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*/ |
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#include <sys/time.h> |
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#include <sys/socket.h> |
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#include <netinet/in.h> |
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#include <netinet/ip.h> |
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#include <netinet/ip_var.h> |
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#include <netinet/udp.h> |
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#include <netinet/udp_var.h> |
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#include <netinet/tcp.h> |
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#include <inttypes.h> |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#include <unistd.h> |
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#include "addrtoname.h" |
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#include "interface.h" |
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#include "extract.h" /* must come after interface.h */ |
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/* Compatibility */ |
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#ifndef IPPROTO_ND |
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#define IPPROTO_ND 77 |
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#endif |
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#ifndef IN_CLASSD |
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#define IN_CLASSD(i) (((int32_t)(i) & 0xf0000000) == 0xe0000000) |
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#endif |
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/* Definitions required for ECN |
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for use if the OS running tcpdump does not have ECN */ |
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#ifndef IPTOS_ECT |
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#define IPTOS_ECT 0x02 /* ECN Capable Transport in IP header*/ |
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#endif |
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#ifndef IPTOS_CE |
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#define IPTOS_CE 0x01 /* ECN Cong. Experienced in IP header*/ |
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#endif |
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/* (following from ipmulti/mrouted/prune.h) */ |
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/* |
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* The packet format for a traceroute request. |
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*/ |
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struct tr_query { |
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u_int tr_src; /* traceroute source */ |
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u_int tr_dst; /* traceroute destination */ |
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u_int tr_raddr; /* traceroute response address */ |
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#if BYTE_ORDER == BIG_ENDIAN |
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struct { |
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u_int ttl : 8; /* traceroute response ttl */ |
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u_int qid : 24; /* traceroute query id */ |
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} q; |
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#else |
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struct { |
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u_int qid : 24; /* traceroute query id */ |
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u_int ttl : 8; /* traceroute response ttl */ |
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} q; |
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#endif |
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}; |
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#define tr_rttl q.ttl |
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#define tr_qid q.qid |
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/* |
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* Traceroute response format. A traceroute response has a tr_query at the |
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* beginning, followed by one tr_resp for each hop taken. |
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*/ |
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struct tr_resp { |
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u_int tr_qarr; /* query arrival time */ |
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u_int tr_inaddr; /* incoming interface address */ |
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u_int tr_outaddr; /* outgoing interface address */ |
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u_int tr_rmtaddr; /* parent address in source tree */ |
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u_int tr_vifin; /* input packet count on interface */ |
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u_int tr_vifout; /* output packet count on interface */ |
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u_int tr_pktcnt; /* total incoming packets for src-grp */ |
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u_char tr_rproto; /* routing proto deployed on router */ |
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u_char tr_fttl; /* ttl required to forward on outvif */ |
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u_char tr_smask; /* subnet mask for src addr */ |
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u_char tr_rflags; /* forwarding error codes */ |
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}; |
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/* defs within mtrace */ |
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#define TR_QUERY 1 |
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#define TR_RESP 2 |
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/* fields for tr_rflags (forwarding error codes) */ |
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#define TR_NO_ERR 0 |
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#define TR_WRONG_IF 1 |
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#define TR_PRUNED 2 |
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#define TR_OPRUNED 3 |
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#define TR_SCOPED 4 |
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#define TR_NO_RTE 5 |
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#define TR_NO_FWD 7 |
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#define TR_NO_SPACE 0x81 |
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#define TR_OLD_ROUTER 0x82 |
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/* fields for tr_rproto (routing protocol) */ |
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#define TR_PROTO_DVMRP 1 |
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#define TR_PROTO_MOSPF 2 |
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#define TR_PROTO_PIM 3 |
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#define TR_PROTO_CBT 4 |
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static void print_mtrace(const u_char *bp, u_int len) |
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{ |
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struct tr_query *tr = (struct tr_query *)(bp + 8); |
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printf("mtrace %d: %s to %s reply-to %s", tr->tr_qid, |
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ipaddr_string(&tr->tr_src), ipaddr_string(&tr->tr_dst), |
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ipaddr_string(&tr->tr_raddr)); |
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if (IN_CLASSD(ntohl(tr->tr_raddr))) |
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printf(" with-ttl %d", tr->tr_rttl); |
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} |
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static void print_mresp(const u_char *bp, u_int len) |
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{ |
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struct tr_query *tr = (struct tr_query *)(bp + 8); |
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printf("mresp %d: %s to %s reply-to %s", tr->tr_qid, |
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ipaddr_string(&tr->tr_src), ipaddr_string(&tr->tr_dst), |
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ipaddr_string(&tr->tr_raddr)); |
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if (IN_CLASSD(ntohl(tr->tr_raddr))) |
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printf(" with-ttl %d", tr->tr_rttl); |
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} |
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static void |
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igmp_print(const u_char *bp, u_int len, const u_char *bp2) |
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{ |
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const struct ip *ip; |
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ip = (const struct ip *)bp2; |
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(void)printf("%s > %s: ", |
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ipaddr_string(&ip->ip_src), |
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ipaddr_string(&ip->ip_dst)); |
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TCHECK2(bp[0], 8); |
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switch (bp[0]) { |
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case 0x11: |
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(void)printf("igmp query"); |
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if (*(int *)&bp[4]) |
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(void)printf(" [gaddr %s]", ipaddr_string(&bp[4])); |
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if (len != 8) |
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(void)printf(" [len %d]", len); |
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break; |
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case 0x12: |
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(void)printf("igmp report %s", ipaddr_string(&bp[4])); |
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if (len != 8) |
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(void)printf(" [len %d]", len); |
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break; |
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case 0x16: |
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(void)printf("igmp nreport %s", ipaddr_string(&bp[4])); |
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break; |
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case 0x17: |
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(void)printf("igmp leave %s", ipaddr_string(&bp[4])); |
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break; |
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case 0x13: |
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(void)printf("igmp dvmrp"); |
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if (len < 8) |
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(void)printf(" [len %d]", len); |
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else |
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dvmrp_print(bp, len); |
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break; |
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case 0x14: |
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(void)printf("igmp pim"); |
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pim_print(bp, len); |
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break; |
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case 0x1e: |
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print_mresp(bp, len); |
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break; |
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case 0x1f: |
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print_mtrace(bp, len); |
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break; |
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default: |
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(void)printf("igmp-%d", bp[0] & 0xf); |
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break; |
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} |
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if ((bp[0] >> 4) != 1) |
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(void)printf(" [v%d]", bp[0] >> 4); |
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TCHECK2(bp[0], len); |
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if (vflag) { |
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/* Check the IGMP checksum */ |
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u_int32_t sum = 0; |
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int count; |
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const u_short *sp = (u_short *)bp; |
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for (count = len / 2; --count >= 0; ) |
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sum += *sp++; |
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if (len & 1) |
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sum += ntohs(*(u_char *) sp << 8); |
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while (sum >> 16) |
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sum = (sum & 0xffff) + (sum >> 16); |
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sum = 0xffff & ~sum; |
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if (sum != 0) |
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printf(" bad igmp cksum %x!", EXTRACT_16BITS(&bp[2])); |
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} |
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return; |
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trunc: |
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fputs("[|igmp]", stdout); |
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} |
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/* |
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* print the recorded route in an IP RR, LSRR or SSRR option. |
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*/ |
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static void |
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ip_printroute(const char *type, const u_char *cp, u_int length) |
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{ |
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u_int ptr = cp[2] - 1; |
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u_int len; |
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printf(" %s{", type); |
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if ((length + 1) & 3) |
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printf(" [bad length %d]", length); |
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if (ptr < 3 || ((ptr + 1) & 3) || ptr > length + 1) |
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printf(" [bad ptr %d]", cp[2]); |
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type = ""; |
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for (len = 3; len < length; len += 4) { |
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if (ptr == len) |
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type = "#"; |
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printf("%s%s", type, ipaddr_string(&cp[len])); |
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type = " "; |
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} |
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printf("%s}", ptr == len? "#" : ""); |
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} |
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/* |
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* print IP options. |
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*/ |
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static void |
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ip_optprint(const u_char *cp, u_int length) |
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{ |
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u_int len; |
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int tt; |
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for (; length > 0; cp += len, length -= len) { |
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TCHECK(cp[1]); |
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tt = *cp; |
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len = (tt == IPOPT_NOP || tt == IPOPT_EOL) ? 1 : cp[1]; |
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if (len <= 0) { |
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printf("[|ip op len %d]", len); |
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return; |
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} |
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if (&cp[1] >= snapend || cp + len > snapend) { |
267 |
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printf("[|ip]"); |
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return; |
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} |
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switch (tt) { |
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case IPOPT_EOL: |
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printf(" EOL"); |
274 |
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if (length > 1) |
275 |
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printf("-%d", length - 1); |
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return; |
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278 |
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case IPOPT_NOP: |
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printf(" NOP"); |
280 |
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break; |
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282 |
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case IPOPT_TS: |
283 |
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printf(" TS{%d}", len); |
284 |
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break; |
285 |
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286 |
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case IPOPT_SECURITY: |
287 |
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printf(" SECURITY{%d}", len); |
288 |
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break; |
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290 |
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case IPOPT_RR: |
291 |
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printf(" RR{%d}=", len); |
292 |
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ip_printroute("RR", cp, len); |
293 |
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break; |
294 |
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295 |
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case IPOPT_SSRR: |
296 |
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ip_printroute("SSRR", cp, len); |
297 |
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break; |
298 |
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299 |
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case IPOPT_LSRR: |
300 |
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ip_printroute("LSRR", cp, len); |
301 |
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break; |
302 |
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303 |
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default: |
304 |
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printf(" IPOPT-%d{%d}", cp[0], len); |
305 |
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break; |
306 |
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} |
307 |
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} |
308 |
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return; |
309 |
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310 |
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trunc: |
311 |
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printf("[|ip]"); |
312 |
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} |
313 |
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314 |
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/* |
315 |
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* compute an IP header checksum. |
316 |
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* don't modifiy the packet. |
317 |
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*/ |
318 |
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u_short |
319 |
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in_cksum(const u_short *addr, int len, int csum) |
320 |
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{ |
321 |
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int nleft = len; |
322 |
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const u_short *w = addr; |
323 |
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u_short answer; |
324 |
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int sum = csum; |
325 |
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|
326 |
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/* |
327 |
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* Our algorithm is simple, using a 32 bit accumulator (sum), |
328 |
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* we add sequential 16 bit words to it, and at the end, fold |
329 |
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* back all the carry bits from the top 16 bits into the lower |
330 |
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* 16 bits. |
331 |
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*/ |
332 |
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while (nleft > 1) { |
333 |
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sum += *w++; |
334 |
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nleft -= 2; |
335 |
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} |
336 |
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if (nleft == 1) |
337 |
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sum += htons(*(u_char *)w<<8); |
338 |
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|
339 |
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/* |
340 |
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* add back carry outs from top 16 bits to low 16 bits |
341 |
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*/ |
342 |
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sum = (sum >> 16) + (sum & 0xffff); /* add hi 16 to low 16 */ |
343 |
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sum += (sum >> 16); /* add carry */ |
344 |
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answer = ~sum; /* truncate to 16 bits */ |
345 |
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return (answer); |
346 |
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} |
347 |
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|
348 |
|
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/* |
349 |
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* print an IP datagram. |
350 |
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*/ |
351 |
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void |
352 |
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ip_print(const u_char *bp, u_int length) |
353 |
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{ |
354 |
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const struct ip *ip; |
355 |
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u_int hlen, len, off; |
356 |
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const u_char *cp; |
357 |
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const u_char *pktp = packetp; |
358 |
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const u_char *send = snapend; |
359 |
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360 |
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TCHECK2(bp[0], 1); |
361 |
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ip = (const struct ip *)bp; |
362 |
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|
363 |
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/* |
364 |
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* If the IP header is not aligned, copy into abuf. |
365 |
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* This will never happen with BPF. It does happen with raw packet |
366 |
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* dumps from -r. |
367 |
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*/ |
368 |
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if ((intptr_t)ip & (sizeof(u_int32_t)-1)) { |
369 |
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static u_char *abuf = NULL; |
370 |
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static int didwarn = 0; |
371 |
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int clen = snapend - bp; |
372 |
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373 |
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if (clen > snaplen) |
374 |
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clen = snaplen; |
375 |
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if (abuf == NULL) { |
376 |
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abuf = malloc(snaplen); |
377 |
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if (abuf == NULL) |
378 |
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error("ip_print: malloc"); |
379 |
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} |
380 |
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memmove((char *)abuf, (char *)ip, min(length, clen)); |
381 |
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snapend = abuf + clen; |
382 |
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packetp = abuf; |
383 |
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ip = (struct ip *)abuf; |
384 |
|
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/* We really want libpcap to give us aligned packets */ |
385 |
|
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if (!didwarn) { |
386 |
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warning("compensating for unaligned libpcap packets"); |
387 |
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++didwarn; |
388 |
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} |
389 |
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} |
390 |
|
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|
391 |
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TCHECK(*ip); |
392 |
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if (ip->ip_v != IPVERSION) { |
393 |
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(void)printf("bad-ip-version %u", ip->ip_v); |
394 |
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goto out; |
395 |
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} |
396 |
|
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|
397 |
|
|
len = ntohs(ip->ip_len); |
398 |
|
|
if (length < len) { |
399 |
|
|
(void)printf("truncated-ip - %d bytes missing!", |
400 |
|
|
len - length); |
401 |
|
|
len = length; |
402 |
|
|
} |
403 |
|
|
|
404 |
|
|
hlen = ip->ip_hl * 4; |
405 |
|
|
if (hlen < sizeof(struct ip) || hlen > len) { |
406 |
|
|
(void)printf("bad-hlen %d", hlen); |
407 |
|
|
goto out; |
408 |
|
|
} |
409 |
|
|
|
410 |
|
|
len -= hlen; |
411 |
|
|
|
412 |
|
|
/* |
413 |
|
|
* If this is fragment zero, hand it to the next higher |
414 |
|
|
* level protocol. |
415 |
|
|
*/ |
416 |
|
|
off = ntohs(ip->ip_off); |
417 |
|
|
if ((off & 0x1fff) == 0) { |
418 |
|
|
cp = (const u_char *)ip + hlen; |
419 |
|
|
if (cp > snapend) |
420 |
|
|
goto trunc; |
421 |
|
|
switch (ip->ip_p) { |
422 |
|
|
|
423 |
|
|
case IPPROTO_TCP: |
424 |
|
|
tcp_print(cp, len, (const u_char *)ip); |
425 |
|
|
break; |
426 |
|
|
|
427 |
|
|
case IPPROTO_UDP: |
428 |
|
|
udp_print(cp, len, (const u_char *)ip); |
429 |
|
|
break; |
430 |
|
|
|
431 |
|
|
case IPPROTO_ICMP: |
432 |
|
|
icmp_print(cp, len, (const u_char *)ip); |
433 |
|
|
break; |
434 |
|
|
|
435 |
|
|
#ifndef IPPROTO_IGRP |
436 |
|
|
#define IPPROTO_IGRP 9 |
437 |
|
|
#endif |
438 |
|
|
case IPPROTO_IGRP: |
439 |
|
|
igrp_print(cp, len, (const u_char *)ip); |
440 |
|
|
break; |
441 |
|
|
|
442 |
|
|
case IPPROTO_ND: |
443 |
|
|
(void)printf("%s > %s:", ipaddr_string(&ip->ip_src), |
444 |
|
|
ipaddr_string(&ip->ip_dst)); |
445 |
|
|
(void)printf(" nd %d", len); |
446 |
|
|
break; |
447 |
|
|
|
448 |
|
|
#ifndef IPPROTO_OSPF |
449 |
|
|
#define IPPROTO_OSPF 89 |
450 |
|
|
#endif |
451 |
|
|
case IPPROTO_OSPF: |
452 |
|
|
ospf_print(cp, len, (const u_char *)ip); |
453 |
|
|
break; |
454 |
|
|
|
455 |
|
|
#ifndef IPPROTO_IGMP |
456 |
|
|
#define IPPROTO_IGMP 2 |
457 |
|
|
#endif |
458 |
|
|
case IPPROTO_IGMP: |
459 |
|
|
igmp_print(cp, len, (const u_char *)ip); |
460 |
|
|
break; |
461 |
|
|
|
462 |
|
|
#ifndef IPPROTO_IPIP |
463 |
|
|
#define IPPROTO_IPIP 4 |
464 |
|
|
#endif |
465 |
|
|
case IPPROTO_IPIP: |
466 |
|
|
/* ip-in-ip encapsulation */ |
467 |
|
|
if (vflag) |
468 |
|
|
(void)printf("%s > %s: ", |
469 |
|
|
ipaddr_string(&ip->ip_src), |
470 |
|
|
ipaddr_string(&ip->ip_dst)); |
471 |
|
|
ip_print(cp, len); |
472 |
|
|
if (! vflag) { |
473 |
|
|
printf(" (encap)"); |
474 |
|
|
goto out; |
475 |
|
|
} |
476 |
|
|
break; |
477 |
|
|
|
478 |
|
|
#ifdef INET6 |
479 |
|
|
#ifndef IPPROTO_IPV6 |
480 |
|
|
#define IPPROTO_IPV6 |
481 |
|
|
#endif |
482 |
|
|
case IPPROTO_IPV6: |
483 |
|
|
/* ip6-in-ip encapsulation */ |
484 |
|
|
if (vflag) |
485 |
|
|
(void)printf("%s > %s: ", |
486 |
|
|
ipaddr_string(&ip->ip_src), |
487 |
|
|
ipaddr_string(&ip->ip_dst)); |
488 |
|
|
ip6_print(cp, len); |
489 |
|
|
if (! vflag) { |
490 |
|
|
printf(" (encap)"); |
491 |
|
|
goto out; |
492 |
|
|
} |
493 |
|
|
break; |
494 |
|
|
#endif /*INET6*/ |
495 |
|
|
|
496 |
|
|
#ifndef IPPROTO_GRE |
497 |
|
|
#define IPPROTO_GRE 47 |
498 |
|
|
#endif |
499 |
|
|
case IPPROTO_GRE: |
500 |
|
|
if (vflag) |
501 |
|
|
(void)printf("gre %s > %s: ", |
502 |
|
|
ipaddr_string(&ip->ip_src), |
503 |
|
|
ipaddr_string(&ip->ip_dst)); |
504 |
|
|
/* do it */ |
505 |
|
|
gre_print(cp, len); |
506 |
|
|
if (! vflag) { |
507 |
|
|
printf(" (gre encap)"); |
508 |
|
|
goto out; |
509 |
|
|
} |
510 |
|
|
break; |
511 |
|
|
|
512 |
|
|
#ifndef IPPROTO_ESP |
513 |
|
|
#define IPPROTO_ESP 50 |
514 |
|
|
#endif |
515 |
|
|
case IPPROTO_ESP: |
516 |
|
|
esp_print(cp, len, (const u_char *)ip); |
517 |
|
|
break; |
518 |
|
|
|
519 |
|
|
#ifndef IPPROTO_AH |
520 |
|
|
#define IPPROTO_AH 51 |
521 |
|
|
#endif |
522 |
|
|
case IPPROTO_AH: |
523 |
|
|
ah_print(cp, len, (const u_char *)ip); |
524 |
|
|
break; |
525 |
|
|
|
526 |
|
|
#ifndef IPPROTO_MOBILE |
527 |
|
|
#define IPPROTO_MOBILE 55 |
528 |
|
|
#endif |
529 |
|
|
case IPPROTO_MOBILE: |
530 |
|
|
if (vflag) |
531 |
|
|
(void)printf("mobile %s > %s: ", |
532 |
|
|
ipaddr_string(&ip->ip_src), |
533 |
|
|
ipaddr_string(&ip->ip_dst)); |
534 |
|
|
mobile_print(cp, len); |
535 |
|
|
if (! vflag) { |
536 |
|
|
printf(" (mobile encap)"); |
537 |
|
|
goto out; |
538 |
|
|
} |
539 |
|
|
break; |
540 |
|
|
|
541 |
|
|
#ifndef IPPROTO_ETHERIP |
542 |
|
|
#define IPPROTO_ETHERIP 97 |
543 |
|
|
#endif |
544 |
|
|
case IPPROTO_ETHERIP: |
545 |
|
|
etherip_print(cp, snapend - cp, len, |
546 |
|
|
(const u_char *)ip); |
547 |
|
|
break; |
548 |
|
|
|
549 |
|
|
#ifndef IPPROTO_IPCOMP |
550 |
|
|
#define IPPROTO_IPCOMP 108 |
551 |
|
|
#endif |
552 |
|
|
case IPPROTO_IPCOMP: |
553 |
|
|
ipcomp_print(cp, len, (const u_char *)ip); |
554 |
|
|
break; |
555 |
|
|
|
556 |
|
|
#ifndef IPPROTO_CARP |
557 |
|
|
#define IPPROTO_CARP 112 |
558 |
|
|
#endif |
559 |
|
|
case IPPROTO_CARP: |
560 |
|
|
if (packettype == PT_VRRP) { |
561 |
|
|
if (vflag) |
562 |
|
|
(void)printf("vrrp %s > %s: ", |
563 |
|
|
ipaddr_string(&ip->ip_src), |
564 |
|
|
ipaddr_string(&ip->ip_dst)); |
565 |
|
|
vrrp_print(cp, len, ip->ip_ttl); |
566 |
|
|
} else { |
567 |
|
|
if (vflag) |
568 |
|
|
(void)printf("carp %s > %s: ", |
569 |
|
|
ipaddr_string(&ip->ip_src), |
570 |
|
|
ipaddr_string(&ip->ip_dst)); |
571 |
|
|
carp_print(cp, len, ip->ip_ttl); |
572 |
|
|
} |
573 |
|
|
break; |
574 |
|
|
|
575 |
|
|
#ifndef IPPROTO_PFSYNC |
576 |
|
|
#define IPPROTO_PFSYNC 240 |
577 |
|
|
#endif |
578 |
|
|
case IPPROTO_PFSYNC: |
579 |
|
|
pfsync_ip_print(cp, |
580 |
|
|
(int)(snapend - (u_char *)ip) - hlen, |
581 |
|
|
(const u_char *)ip); |
582 |
|
|
break; |
583 |
|
|
|
584 |
|
|
default: |
585 |
|
|
(void)printf("%s > %s:", ipaddr_string(&ip->ip_src), |
586 |
|
|
ipaddr_string(&ip->ip_dst)); |
587 |
|
|
(void)printf(" ip-proto-%d %d", ip->ip_p, len); |
588 |
|
|
break; |
589 |
|
|
} |
590 |
|
|
} |
591 |
|
|
/* |
592 |
|
|
* for fragmented datagrams, print id:size@offset. On all |
593 |
|
|
* but the last stick a "+". For unfragmented datagrams, note |
594 |
|
|
* the don't fragment flag. |
595 |
|
|
*/ |
596 |
|
|
if (off & 0x3fff) { |
597 |
|
|
/* |
598 |
|
|
* if this isn't the first frag, we're missing the |
599 |
|
|
* next level protocol header. print the ip addr. |
600 |
|
|
*/ |
601 |
|
|
if (off & 0x1fff) |
602 |
|
|
(void)printf("%s > %s:", ipaddr_string(&ip->ip_src), |
603 |
|
|
ipaddr_string(&ip->ip_dst)); |
604 |
|
|
(void)printf(" (frag %d:%d@%d%s)", ntohs(ip->ip_id), len, |
605 |
|
|
(off & 0x1fff) * 8, |
606 |
|
|
(off & IP_MF)? "+" : ""); |
607 |
|
|
} |
608 |
|
|
if (off & IP_DF) |
609 |
|
|
(void)printf(" (DF)"); |
610 |
|
|
|
611 |
|
|
if (ip->ip_tos) { |
612 |
|
|
(void)printf(" [tos 0x%x", (int)ip->ip_tos); |
613 |
|
|
if (ip->ip_tos & (IPTOS_CE|IPTOS_ECT)) { |
614 |
|
|
(void)printf(" ("); |
615 |
|
|
if (ip->ip_tos & IPTOS_ECT) { |
616 |
|
|
/* ECN-capable transport */ |
617 |
|
|
putchar('E'); |
618 |
|
|
} |
619 |
|
|
if (ip->ip_tos & IPTOS_CE) { |
620 |
|
|
/* _C_ongestion experienced (ECN) */ |
621 |
|
|
putchar('C'); |
622 |
|
|
} |
623 |
|
|
(void)printf(")"); |
624 |
|
|
} |
625 |
|
|
(void)printf("]"); |
626 |
|
|
} |
627 |
|
|
|
628 |
|
|
if (ip->ip_ttl <= 1) |
629 |
|
|
(void)printf(" [ttl %d]", (int)ip->ip_ttl); |
630 |
|
|
|
631 |
|
|
if (vflag) { |
632 |
|
|
char *sep = ""; |
633 |
|
|
|
634 |
|
|
printf(" ("); |
635 |
|
|
if (ip->ip_ttl > 1) { |
636 |
|
|
(void)printf("%sttl %d", sep, (int)ip->ip_ttl); |
637 |
|
|
sep = ", "; |
638 |
|
|
} |
639 |
|
|
if ((off & 0x3fff) == 0) { |
640 |
|
|
(void)printf("%sid %d", sep, (int)ntohs(ip->ip_id)); |
641 |
|
|
sep = ", "; |
642 |
|
|
} |
643 |
|
|
(void)printf("%slen %u", sep, ntohs(ip->ip_len)); |
644 |
|
|
sep = ", "; |
645 |
|
|
if ((u_char *)ip + hlen <= snapend) { |
646 |
|
|
u_int16_t sum, ip_sum; |
647 |
|
|
sum = in_cksum((const u_short *)ip, hlen, 0); |
648 |
|
|
if (sum != 0) { |
649 |
|
|
ip_sum = EXTRACT_16BITS(&ip->ip_sum); |
650 |
|
|
(void)printf("%sbad ip cksum %x! -> %x", sep, ip_sum, |
651 |
|
|
in_cksum_shouldbe(ip_sum, sum)); |
652 |
|
|
sep = ", "; |
653 |
|
|
} |
654 |
|
|
} |
655 |
|
|
if (hlen > sizeof(struct ip)) { |
656 |
|
|
hlen -= sizeof(struct ip); |
657 |
|
|
(void)printf("%soptlen=%d", sep, hlen); |
658 |
|
|
ip_optprint((u_char *)(ip + 1), hlen); |
659 |
|
|
} |
660 |
|
|
printf(")"); |
661 |
|
|
} |
662 |
|
|
out: |
663 |
|
|
packetp = pktp; |
664 |
|
|
snapend = send; |
665 |
|
|
return; |
666 |
|
|
|
667 |
|
|
trunc: |
668 |
|
|
printf("[|ip]"); |
669 |
|
|
} |